Means for assembling and securing radiating fins on tubes



ecQ 10, 1935.

' MEANS FOR ASSEMBLING AND SECURING RAD IAT ING FINS ON TUBES A. J. MASQN ET AL Filed Jan. 50, 1931 5 Sheets-$heet' 1 MEANS FOR A. J. MASON ET AL ASSEMBLING AND SECURING RADIATING FINS ON TUBES Filed Jan. 30, 1951 3 Sheets-Sheet 2 M) a "b66666" .2

a //Yl [/V TO/Pa Dec; 10, 1935. A. J. MASON ET-A 2,023,738

MEANS FOR ASSEMBLING- AND SECURING RADIATING FINS ON TUBES Filed Jan. so. 1951 s Sheets$heet :5

' I mn ii? 67- v I {a i 4/ AA AKmAM/A I 2 %0 Patented Dec. 10, 1935 UNITED STATES MEANS FOR ASSEIVIBLING AND SECURING RADIATING FINS N TUBES Arthur J. Mason, West Hartford, and William L. Tancred, Hartford, Conn., assignors to The Bush Manufacturing Company,

Hartford,

Conn., a corporation of Connecticut Application January 30, 1931, Serial No. 512,274 8 Claims. (01. 153'-80.5)

Our invention relates to the class of machines employed for assembling radiating fins upon con-' ducting tubes and for securing the fins in place upon said tubes; "and an object of our invention, among others, is the production of a machine of this class that shall be simple in construction and particularly efficient and rapid in operation.

One form of a machine embodying our invention and in the construction and use of which the objects herein set out, aswell as others, may be attained is illustrated in the accompanying drawings, in which- I Figure l is a top View our invention, with parts broken away to show construction and with other parts broken out to reduce the length of the machine;

Figure 2 is a front view of the machine with parts broken out;

Figure 3 is a view, scale enlarged, in vertical section on a plane denoted by the dottedline 3-3 of Figure 1;

Figure 4 is a similar view on a plane denoted by the dotted line 4-4 of Figure 1;

Figure 5 is another sectional view on a plane denoted by the dotted line 5- 5 of Figure 1;

Figure 6 is a sectional view, scale still further enlarged, on a plane denoted by the dotted line 6--6 of Figure 1;

Figure 7 is a similar view on a plane denoted by the dotted line 1-1 of Figure 1;

Figure 8 is another similar view on a plane denoted by the dotted line 8-8 of Figure 1;

- Figure 9 is a side view of a portion of the finished product; and I Figure 10, sheet 1, is a detail isometric view illustrating the manner of holding the tubes during the expanding operations.

In the accompanying drawings the numeral Ill denotes the standards of abase frame that is shape when viewed substantially rectangular in in plan, said frame comprising a shelf II for a motor l2 used motor is connected, as by means of a belt IS,

with a pulley on a clutch shaft 14 mounted in hearings in hangers l5 supported on the base frame. This shaft supports a reversing mechanism including a clutch member l6 which mechanism is of old and well known construction and will be readily understood by those skilled in the art, and for which purpose tailed description is omitted herein, it being sufflcient to state that a movement of the clutch member in opposite directions will cause rotation of a pinion ii in opposite directions, the pinion being loosely. mounted upon'theshaft ll. Said of a machine embodying to operate the machine. .The

a further and depinion meshes with agear l8 secured to a driving shaft l9 mounted in bearings in the hangers i5 and in a carrier frame comprising guides 20 mounted upon the top of the base frame. These guides rest upon and are secured to cross pieces 2| extending across the top of the base frame and comprising a part thereof. Each of the guides 20 has an extension 22 at one end and an extension 23 at the opposite end, these extensions being tied together at suitable intervals by cross bars 28 and supported by legs 25. l

The guides 20 have openings 26 through which the shaft l9 extends, a bearing for the end of said shaft being secured to one of said guides. Each of said guides has a guide groove to receive and support the side bars 21 of a carrier frame, which are connected by tie plates 28-49 forming a part of the carrier frame. The under sides of the bars 21 each have teeth that constitute a rack, said racks meshing with pinions 30 secured to the driving shaft l9, and as shown in Figure 3 v of the drawings.

That cross bar 24 located. near one end of the carrier frame has a series of holes in which the ends of supporting tubes M are secured, said tubes extending through holes in the other cross bars. Each of the tubes has. a slot 32 extending lengthwise thereof, and slots 33 extend through the upper sides of the cross bars into the holes just mentioned. Any suitable number of supporting tubes located side by side may be employed, in the example herein shown, there being eight of said tubes.

Carrier blocks 34- are secured in; a recess on the under side of the tie plate 29, as shown in 35 Figures 4 and 6 of the drawings, there being one of said blocks for each of the tubes 3|. Eachblock has a web 35 'shorter'than a tube 38 to be operated upon. A

clamp 39 is supported as by means of clamp screws 40 'near one shown in Figure 1 of the drawings, this clamp being for the purpose of securing a jig ll in place on the extensions 23 at Covers liare' on the seats l2 forms one end of each of the side bars 20.

pivotally attached to one of the side bars 2. and

to one of the extensions 23. said covers being secured as by mean's'or latch levers ll pivotally' mounted on the cover and engaging a latch on the side" bar or extension opposite those to which the-covers are pivotally attached. These covers end of the'extensions 23 ,'as 45 shown, the fins are arranged in series with spaces 45 between the series.

- In operation the tubes 38 to be operated upon are placed upon the rods 31 with the ends of the tubes resting against the ends of the heads 36, as shown in Figure 6 of the drawings. A guide tip 46 is placed in the end of each of the tubes 38,

as shown in Figure 7 of the drawings. Itwill be understood that a jig having radiating fins 52 held therein for application to the tubes has been placed on the seats 42 and secured by the clamp 39. These fins may be arranged in any suitable manner, it being understood that the holes through the fins will be located in line with the expanding rods and the tubes 38 thereon.

The clutch member i6 is now operated as by means of a clutch lever 41 and a handle 48 therefor whereby the shaft l 9 is rotated in a direction to move all of the expanding rods 31 with the tubes 38 thereon through the fins to the opposite end of the, jig, forward movement of the plate 29 being ended by any suitable stop and with the ends of the heads 36 against the ends of the tubes 38. The tips 46 are now removed and an expanding mandrel 49 having expanders 50 thereon is secured to the end of each of the rods 31,

as by means of interengaging screw threads, and

as shown in Figure 8 of the drawings. Each of the'mandrels preferably has attached to its extreme end a tube cleaner 5| in the form of a brush with very stiir bristles. The handle 48 is now operated to reverse the direction of rotation of the shaft l9 and the expanding rods 31 with the expanders 50 thereon are drawn backward a slight distance into the tubes to create a space between the ends of the tubes, 38 and the tubes 3 I, the plate 29 having had its forward movement terminated with its front edge in proximity to the front edge of one 'of the cross bars 24. Movement of the parts being stopped a retaining block 53 having slots 54 to receive the rods 31 .but too small for the tubes 38 is placed over the rods in the space between the ends of the tubes and the cross piece 24.

The handle 48 is now againoperated to con- .tinue the reverse movement and draw the expanders through the tubes thereby to swell said tubw into tight contact with the fins 52. In this operation the cleaner 5! operates to remove any objectionable matter which may have accumulated within the tube. The 'carrier is moved far enough in this direction to draw the expanders and cleaners out of the ends of the tubes.

The covers 43 may now be raised and the tubes with the fins thereon removed from the machine,- itbeingunderstood that thefins areloosely enough held in their spaces in the jigs to permit their ready removal. The machine is now ready for a repeated operation.

It is here mentioned that the cross-bars 24 project upwardly between the side bars 21, the projecting upper edges of the cross-bars being ately level with the upper edges of said side bars. The bars 21 are seated in notches in -thecross-bars24,asshowninFlgures-4and5 ot'thenrawlngs, ribs on the ends of said crossbars entering grooves II extending lengthwise along the sides of the side bars 21. Guides 56 project downwardly from opposite ends of the tie plate 28 to engage the sidebars of the carrier and guide its movement alongthe extensions 22.

In accordance with the provisions of the patent statutes we have described the principles of operation of our invention, together with the device which we now consider to represent the best embodiment thereof; but we desire to have it understood thatthe device shown is only illustrative and that the invention may be carried out by other means and applied to uses other than those above set out.

What we, claim is:

1. A tube expanding machine including a support, an expanding rod secured to and projecting from said support to receive thereon a tube to be expanded, means for supporting fins in line with said rod, means for efiecting relative movement between said rod with the tube thereon and said fins, and while said rod and tube are maintained in relatively fixed positions, to relatively position the tube within said fins, means for holding said tube and fins in relatively fixed positions, and means for effecting relative movement between said rod and the tube so held to expand the latter.

tube and fins in relatively fixed positions, and

means for reversely moving said support to withdraw said rod and expander to swell the tube into contact with said fins while held insaid position.

3. A tube expanding machine including a carrier, a. plurality of expanding rods secured to said carrier and projecting lengthwise thereof to receive thereon tubes to be expanded, means for supporting a jig with fins therein in line with said rods in one position, means for moving said carrier in one direction to simultaneously project said rods and tubes through said fins with the ends of the rods accessible to receive an expanding mandrel, expanding mandrels secured to the ends of said rods, and means formoving said carrier and rod in the opposite direction independently of said tube to swell said tubes into contact with said fins while maintained in said position.

4. A tube'expariding machine including a car- .rier support, means on said support to receive a jig with fins therein. means for holding said jig in one position, a carrier slidably mounted on the support, expanding rods secured to and projecting from the carrier in line with fins supported in said jig, said rods being positioned to receive tubes to be located thereon, means for moving said carrier and said rods and tubes simultaneously in one direction to locate the tubes in said fins while held in said positions, expanders removably secured to said rods, means for holding thetubes in relative fixed positions with re- "spect to said fins, and means for withdrawing said rods through said tubes to swell the latter into contact with said finswhile maintained in said positions.

5. A tube machine including a carrier supporting frame, a supporting tube secured to said frame and having a lengthwise slot. a

carrier movably mounted on said frame, a carrier block supported by the carrier and projecting through said slot into said tube, an'expanding rod secured to said block to receive a tube to be expanded thereon, means for supporting fins in line with said rod, means for moving said carrier in one direction to position said expanding rod and tube within said fins, and means for moving said carrier in the opposite direction to withdraw said rod from said tube to expand the latter.

6. A' tube expanding machine including a supv port, an expanding rod secured to and projecting from said support to receive thereon a tube to be expanded, means for aflixing 'an "expander to said rod, means for supporting fins independently of the tube and in line with said rod, means for holding the tube and fins in fixed relationship, means for ,effecting relative movement between said rod with the tube thereon and said fins while maintaining the tube and rod in fixed relative positions to assemble said'fins upon the tube, and means for effecting relative movement between the rod and the fins and tube while .the latter areheld in relative fixed'positions to expand said tube within the fins.

7. A tube expanding machine including a carrier supporting frame, a carrier including a tieplate extending across the carrier, heads secured to the underside ofsaid tie-plate, expand.- ing rods projecting from said heads to receive tubes to be expanded, means on said heads to receive the' ends of said tubes to efie'ct movement 5 thereof simultaneously with said rods, means for supporting fins in line with said rods, means for moving said carrier with the tubes and rods through holes in said fins, means for holding said tubes in relative positions with respect to said 10 fins, and means. for reversing movement of the carrier to withdraw the rods from said\tubes to expand the latter.

8. A tube expanding machine including a car- 

